A U.S. soldier was caught attempting to board a flight to Los Angeles on Wednesday with high-velocity explosives in his bag.

Army Private First Class Christopher Eric Wey, 19, was arrested after he tried to board a United flight, the U.S. Attorney's office for Arizona told Reuters.

Reuters reports that TSA officials at the Yuma International Airport detected a half-ounce of C4 explosives hidden in a tobacco can inside one of Wey's bags. In a conflicting report, the Associated Press reports that it was a quarter-ounce.

Wey was detained and interviewed by FBI agents, who in turn discovered that Wey had stolen the C4 while attending an explosive training course.

Authorities found no indication that Wey intended any harm but him with trying to carry an explosive onto an aircraft and a stolen one at that, which carries a maximum penalty of 10 years behind bars and a $250,000 fine.